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Cheap flights from St. Louis to Sofia from $523

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 4/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:30 am - 12:10 pm
STL
-
SOF
19h 40m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$654United Airlines
Wed, Apr 22 - Wed, Apr 29
Multiple Airlines Logo
11:42 am - 2:00 pm
STL
-
SOF
18h 18m
2 stops
Multiple Airlines Logo
7:00 am - 8:44 pm
SOF
-
STL
21h 44m
2 stops
$661Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
Air Canada Logo
4:05 pm - 12:10 pm
STL
-
SOF
36h 05m
2 stops
Air Canada Logo
2:20 pm - 3:25 pm
SOF
-
STL
57h 05m
2 stops
$673Air Canada
Mon, Apr 20 - Mon, Apr 27
Lufthansa Logo
8:30 am - 12:10 pm
STL
-
SOF
19h 40m
2 stops
Lufthansa Logo
6:10 am - 9:13 pm
SOF
-
STL
23h 03m
2 stops
$703Lufthansa
Thu, Apr 23 - Thu, Apr 30
Lufthansa Logo
3:30 pm - 1:25 pm
STL
-
SOF
13h 55m
1 stop
Lufthansa Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$704Lufthansa
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
9:10 am - 11:00 pm
STL
-
SOF
29h 50m
2 stops
United Airlines Logo
1:50 pm - 3:25 pm
SOF
-
STL
33h 35m
2 stops
$712United Airlines
Sun, Apr 19 - Sun, Apr 26
United Airlines Logo
8:15 pm - 10:30 pm
STL
-
SOF
18h 15m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$716United Airlines
Fri, Apr 10 - Fri, May 1
Lufthansa Logo
8:30 am - 12:10 pm
STL
-
SOF
19h 40m
2 stops
Lufthansa Logo
2:10 pm - 1:25 pm
SOF
-
STL
31h 15m
1 stop
$719Lufthansa
Thu, Apr 23 - Thu, Apr 30
Lufthansa Logo
3:30 pm - 6:10 pm
STL
-
SOF
18h 40m
1 stop
Lufthansa Logo
6:20 am - 11:57 pm
SOF
-
STL
25h 37m
2 stops
$722Lufthansa
Sun, Apr 19 - Sun, Apr 26
United Airlines Logo
9:10 am - 1:15 pm
STL
-
SOF
20h 05m
2 stops
United Airlines Logo
6:20 am - 12:24 am
SOF
-
STL
26h 04m
2 stops
$726United Airlines
Fri, Apr 10 - Fri, May 1

Air Canada flights from St. Louis to Sofia

Our best Air Canada deals on St. Louis to Sofia flight tickets
Air Canada
Apr 20
STL4:05 pmLambert-St Louis
36h 05m
2 stops
SOF12:10 pmSofia
Apr 27
SOF2:20 pmSofia
57h 05m
2 stops
STL3:25 pmLambert-St Louis
$673
Air Canada
Apr 22
STL11:15 amLambert-St Louis
16h 55m
3 stops
SOF12:10 pmSofia
Apr 29
SOF6:20 amSofia
17h 05m
2 stops
STL3:25 pmLambert-St Louis
$818
Air Canada
Apr 22
STL11:15 amLambert-St Louis
16h 55m
3 stops
SOF12:10 pmSofia
Apr 29
SOF6:20 amSofia
21h 11m
3 stops
STL7:31 pmLambert-St Louis
$928

British Airways flights from St. Louis to Sofia

Our best British Airways deals on St. Louis to Sofia flight tickets
British Airways
Apr 11
STL8:03 pmLambert-St Louis
39h 17m
2 stops
SOF7:20 pmSofia
Jun 17
SOF9:25 pmSofia
34h 34m
2 stops
STL11:59 pmLambert-St Louis
$781
British Airways
Apr 19
STL5:21 pmLambert-St Louis
17h 59m
2 stops
SOF7:20 pmSofia
Jun 14
SOF9:05 pmSofia
34h 54m
2 stops
STL11:59 pmLambert-St Louis
$834
British Airways
Apr 27
STL8:03 pmLambert-St Louis
40h 27m
2 stops
SOF8:30 pmSofia
Jun 22
SOF8:10 pmSofia
44h 22m
2 stops
STL8:32 amLambert-St Louis
$891

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 10, 2026.
Use the filters below to find and compare flights from St. Louis to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/22

8:30 am-12:10 pm

2 stops19h 40m

Sofia

Wed 4/29

6:20 am-1:25 pm

1 stop15h 05m

$654

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/22

11:42 am-2:00 pm

2 stops18h 18m

Sofia

Wed 4/29

7:00 am-8:44 pm

2 stops21h 44m

$661

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Mon 4/20

4:05 pm-12:10 pm

2 stops36h 05m

Sofia

Mon 4/27

2:20 pm-3:25 pm

2 stops57h 05m

$673

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 4/23

8:30 am-12:10 pm

2 stops19h 40m

Sofia

Thu 4/30

6:10 am-9:13 pm

2 stops23h 03m

$703
Quickest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 4/22

3:30 pm-1:25 pm

1 stop13h 55m

Sofia

Wed 4/29

6:20 am-1:25 pm

1 stop15h 05m

$704

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 4/19

9:10 am-11:00 pm

2 stops29h 50m

Sofia

Sun 4/26

1:50 pm-3:25 pm

2 stops33h 35m

$712

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Fri 4/10

8:15 pm-10:30 pm

2 stops18h 15m

Sofia

Fri 5/1

6:20 am-1:25 pm

1 stop15h 05m

$716

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 4/23

8:30 am-12:10 pm

2 stops19h 40m

Sofia

Thu 4/30

2:10 pm-1:25 pm

1 stop31h 15m

$719

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 4/19

3:30 pm-6:10 pm

1 stop18h 40m

Sofia

Sun 4/26

6:20 am-11:57 pm

2 stops25h 37m

$722

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Fri 4/10

9:10 am-1:15 pm

2 stops20h 05m

Sofia

Fri 5/1

6:20 am-12:24 am

2 stops26h 04m

$726

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Sofia from

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $849 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from St. Louis for as low as $730 on momondo.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 7% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Fastest flight time

19h 40m

Direct flights

None
The fastest flight from St. Louis to Sofia takes 19h 40m
There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.
Search flight deals

  • How far is Lambert-St Louis to Sofia by plane?

    A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 19h 40m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

    Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Sofia?

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,409 reviews
Search United Airlines flights
LufthansaPriceFrom $603Free CancellationRating
6.8
7,840 reviews
Search Lufthansa flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

Price alerts on flights to Sofia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Lufthansa
United Airlines